Nineteen. Alone. Christmas Eve. Lillian gave birth and left her daughter at the door of the father—a cold-hearted CEO who didn't even know she existed. Five years later, she's back as a cleaner in his building, scrubbing floors to stay close to the child she never stopped loving. Then Richard discovers the truth. He marries her out of duty. He falls for her against every wall he's built. But Lillian has secrets too: she's not just a cleaner. She's an heiress. And the conspiracy that tore them apart is just getting started.